My Toshiba Laptop did the update and when finished I could not access the Internet. Emails were OK. After logging on, my opening screen had been replaced by a window with light streaming through it. Hitting the E button led to a screen inviting " search or enter web address " which would not take you anywhere and vanished after a few seconds. In that few seconds there was no trace of previous saved web addresses. How do I solve this? ( I know very little about computers ).